<template>
  <div class="article-container">
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" left-arrow title="黑马头条" @click-left="$router.back()"></van-nav-bar>
    <!-- /导航栏 -->

    <div class="main-wrap">
      <!-- 加载中 -->
      <div class="loading-wrap" v-if="loading">
        <van-loading color="#3296fa" vertical>加载中</van-loading>
      </div>
      <!-- /加载中 -->

      <!-- 加载完成-文章详情 -->
      <div
        class="article-detail markdown-body"
        ref="contentRef"
        v-else-if="article.title"
      >
        <!-- 文章标题 -->
        <h1 class="article-title">{{ article.title }}</h1>
        <!-- /文章标题 -->

        <!-- 用户信息 -->
        <van-cell class="user-badge" center :border="false">
          <van-image
            class="avatar"
            slot="icon"
            round
            fit="cover"
            :src="article.aut_photo"
          />
          <div slot="title" class="user-name">{{ article.aut_name }}</div>
          <div slot="label" class="publish-date">
            {{ article.pubdate | relativeTime }}
          </div>
          <follow-user
          :is-follow="article.is_followed"
          :autId="article.aut_id"
          @updateFollow="article.is_followed = $event"
          ></follow-user>
        </van-cell>
        <!-- /用户信息 -->

        <!-- 文章内容 -->
        <div class="article-content" v-html="article.content"></div>
        <van-divider>正文结束</van-divider>

        <!-- 评论列表 -->
      <commont-user v-if="article.art_id" :articleId="article.art_id" @loadingCommont="commontCount=$event.total_count" @click-reply="replay" :list="commontList"></commont-user>
      <!--/ 评论列表 -->
      </div>
      <!-- /加载完成-文章详情 -->
      <!-- 加载失败：404 -->
      <div class="error-wrap" v-else-if="errStatus === 404">
        <van-icon name="failure" />
        <p class="text">该资源不存在或已删除！</p>
      </div>
      <!-- /加载失败：404 -->

      <!-- 加载失败：其它未知错误（例如网络原因或服务端异常） -->
      <div class="error-wrap" v-else>
        <van-icon name="failure" />
        <p class="text">内容加载失败！</p>
        <van-button class="retry-btn" @click="loadingArticle"
          >点击重试</van-button
        >
      </div>
      <!-- /加载失败：其它未知错误（例如网络原因或服务端异常） -->
    </div>
    <!-- 底部区域 -->
    <div class="article-bottom" v-if="article.aut_id">
      <van-button class="comment-btn" type="default" round size="small" @click="isShowProp=true"
        >写评论</van-button
      >
      <!-- 写评论弹层 -->
    <van-popup
          v-model="isShowProp"
          position="bottom"
        >
        <commontTalk :artId="article.art_id" @update="updateCommont"></commontTalk>
    </van-popup>
      <van-icon name="comment-o" :badge="commontCount" color="#777" />
      <!-- 使用v-model,进行组件父传子，子改变父组件的数据 属性值：value;触发的方法：input;====> 可以在子组件的modle改变value的名字，以及触发方法的名字 -->
      <collection v-model="article.is_collected" v-if="article.title" :collectionId="article.art_id"></collection>
      <!-- <van-icon color="#777" name="star-o" /> -->
      <thumbs-up :like-thumbs.sync="article.like_count" v-model="article.art_id"></thumbs-up>
      <!-- <van-icon color="#777" name="good-job-o" /> -->

      <van-icon name="share" color="#777777"></van-icon>
    </div>
   <van-popup
        v-model="showProp"
        closeable
        close-icon-position="top-left"
        position="bottom"
        :style="{ height: '100%' }"
      >
    <commont-contain :comment="Plist" v-if="showProp"></commont-contain>
    </van-popup>
    <!-- /底部区域 -->
  </div>
</template>

<script>

import { getChannelsDetails } from '@/api/article'
import { ImagePreview } from 'vant'
import followUser from '@/components/follow-user'
import collection from '@/components/collection-user'
import thumbsUp from '@/components/thumbs-up'
import commontUser from '@/components/commont-user'
import commontTalk from '@/components/commonts/commont-talk'
import commontContain from '@/components/commonts/commont-contain'
export default {
  name: 'ArticleIndex',
  components: {
    followUser,
    collection,
    thumbsUp,
    commontUser,
    commontTalk,
    commontContain
  },
  props: {
    articleId: {
      type: [Number, String],
      required: true
    }
  },
  provide: function () {
    return {
      articleId: this.articleId
    }
  },
  data () {
    return {
      article: {}, // 请求的数据信息
      loading: true, // 加载状态
      errStatus: 0, // 错误状态码
      isLoading: false,
      commontCount: 0, // 回复的评论数
      isShowProp: false, // 评论弹层
      showProp: false, // 弹出层
      commontList: [],
      Plist: {} // 子弹出层的数据
    }
  },
  computed: {},
  watch: {},
  created () {
    this.loadingArticle()
  },
  mounted () {},
  methods: {
    async loadingArticle () {
      this.loading = true
      try {
        // if (Math.random() > 0.5) {
        //   JSON.parse('bihvhbh77')
        // }
        const { data } = await getChannelsDetails(this.articleId)
        this.article = data.data
        console.log(data)
        setTimeout(() => {
          this.previewImg()
        }, 0)
      } catch (err) {
        if (err.response && err.response.status === 404) {
          this.errStatus = 404
        }
        console.log('请求失败', err)
      }
      this.loading = false
    },
    previewImg () {
      // 图片预览
      // 获取文章内容的dom节点
      const contentEl = this.$refs.contentRef
      // 获取所有img标签
      const Imgs = contentEl.querySelectorAll('img')
      const images = [] // 定义空数组方便切换
      // 对所有的img标签进行遍历
      Imgs.forEach((item, i) => {
        images.push(item.src)
        item.onclick = () => {
          ImagePreview({
            images,
            startPosition: i // 切换的页码
          })
        }
      })
    },
    replay (v) { // 点击打开子回复框
      this.showProp = true
      this.Plist = v
    },
    updateCommont (v) {
      this.isShowProp = false
      this.commontCount++
      this.commontList.unshift(v.new_obj)
    }
  }
}
</script>

<style scoped lang="less">
@import "./github-markdown.css";
.article-container {
  .main-wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 92px;
    bottom: 88px;
    overflow-y: scroll;
    background-color: #fff;
  }
  .article-detail {
    .article-title {
      font-size: 40px;
      padding: 50px 32px;
      margin: 0;
      color: #3a3a3a;
    }

    .user-badge {
      padding: 0 32px;
      .avatar {
        width: 70px;
        height: 70px;
        margin-right: 17px;
      }
      .van-cell__label {
        margin-top: 0;
      }
      .user-name {
        font-size: 24px;
        color: #3a3a3a;
      }
      .publish-date {
        font-size: 23px;
        color: #b7b7b7;
      }
      .follow-btn {
        width: 170px;
        height: 58px;
      }
    }

    .article-content {
      padding: 55px 32px;
      /deep/ p {
        text-align: justify;
      }
    }
  }

  .loading-wrap {
    padding: 200px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
  }

  .error-wrap {
    padding: 200px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    .van-icon {
      font-size: 122px;
      color: #b4b4b4;
    }
    .text {
      font-size: 30px;
      color: #666666;
      margin: 33px 0 46px;
    }
    .retry-btn {
      width: 280px;
      height: 70px;
      line-height: 70px;
      border: 1px solid #c3c3c3;
      font-size: 30px;
      color: #666666;
    }
  }

  .article-bottom {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-sizing: border-box;
    height: 88px;
    border-top: 1px solid #d8d8d8;
    background-color: #fff;
    .comment-btn {
      width: 282px;
      height: 46px;
      border: 2px solid #eeeeee;
      font-size: 30px;
      line-height: 46px;
      color: #a7a7a7;
    }
    .van-icon {
      font-size: 40px;
      .van-badge {
        font-size: 16px;
        background-color: #e22829;
      }
    }
  }
}
/deep/.van-icon-arrow-left{
  color: white !important;
}
</style>
